package com.mini.cn.goods.util;

import org.apache.tomcat.util.codec.binary.Base64;

import java.security.MessageDigest;

public class SHA1Utils {

    private static char[] hexDigits = {'0', '1', '2', '3', '4', '5', '6', '7',
            '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};

    public static String sign(String pwd) {
        if (pwd == null)
            return null;
        try {
            MessageDigest md = MessageDigest.getInstance("SHA");
            md.update(pwd.getBytes());
            byte[] sign = md.digest();
            String result = Base64.encodeBase64URLSafeString(sign);
            return result;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public static String signbase64(String pwd) {
        if (pwd == null)
            return null;
        try {
            MessageDigest md = MessageDigest.getInstance("SHA");
            md.update(pwd.getBytes());
            byte[] sign = md.digest();
            String result = Base64.encodeBase64String(sign);
            return result;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public final static String MD5(String s) {
        try {
            byte[] btInput = s.getBytes();
            // 获得MD5摘要算法的 MessageDigest 对象
            MessageDigest mdInst = MessageDigest.getInstance("MD5");
            // 使用指定的字节更新摘要
            mdInst.update(btInput);
            // 获得密文
            byte[] md = mdInst.digest();
            // 把密文转换成十六进制的字符串形式
            int j = md.length;
            char[] str = new char[j * 2];
            int k = 0;
            for (int i = 0; i < j; i++) {
                byte byte0 = md[i];
                str[k++] = hexDigits[byte0 >>> 4 & 0xf];
                str[k++] = hexDigits[byte0 & 0xf];
            }
            return new String(str);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
}
